linux-kernel - [PATCH v2 09/25] fs: Add a filesystem flag for large pages

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Date:   Tue, 11 Feb 2020 20:18:29 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     linux-fsdevel@...r.kernel.org, linux-mm@...ck.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 09/25] fs: Add a filesystem flag for large pages

From: "Matthew Wilcox (Oracle)" <willy@...radead.org>

The page cache needs to know whether the filesystem supports pages >
PAGE_SIZE.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 include/linux/fs.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index d4e2d2964346..24e720723afb 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2235,6 +2235,7 @@ struct file_system_type {
 #define FS_HAS_SUBTYPE		4
 #define FS_USERNS_MOUNT		8	/* Can be mounted by userns root */
 #define FS_DISALLOW_NOTIFY_PERM	16	/* Disable fanotify permission events */
+#define FS_LARGE_PAGES		8192	/* Remove once all fs converted */
 #define FS_RENAME_DOES_D_MOVE	32768	/* FS will handle d_move() during rename() internally. */
 	int (*init_fs_context)(struct fs_context *);
 	const struct fs_parameter_spec *parameters;
-- 
2.25.0